Safety gas-burner.



V e. F. HERRMANN.

SAFETY GAS BURNER.

15135,,Qfl3

APPLICATION FILED OCT. 8, 1914.

Patented. Apr. 13, 1915 I\\- Ii 77 I) I 7/ i 7 m v ul- 7 2 g 5 m 26 72 'I T 7? I u 74 74 27 LORRIS PETERS CO1. PHOTC-LITHQ. WASHINGION. n. c

TINTTE GEORGE F. HERRMANN, 0E JERSEY CITY, NEW JERSEY.

SAFETY GAS-BURNER.

Specification of Letters Patent.

Patented Apr. 13, 1915.

Application filed October 8, 1914. Serial No. 865,723.

To all whom it may concern:

Be it known that I, GEORGE F.HERR1\IANN, a subject of the Emperor of Germany, and a resident of Jersey City, county of Hudson, and State of New Jersey, have invented certain new and useful Improvements in Safety Gas-Burners, of which the following is a full, clear, and exact description.

This invention relates more particularly to a gas burner in which the supply of gas to the burner is automatically shut off as soon as the light is put out, either by blowing out the light or by turning ofi the gas.

In ordinary burners, should the light be blown out by those ignorant of devices of this kind as sometimes happens, or should the light of a burner be put out by the gas being turned ofi' or the pressure of the sup ply reduced and then the gas turned on again without any means for igniting the same, the gas under these conditions would be permitted to flow freely from the burner which might result, and as a matter of fact often does result, in loss of life and property.

One of the principal objects of the invention is to overcome the objections referred to and to provide a simple and eflicient burner, the source of supply to which is controlled by heating a portion thereof and which as soon as the heat, as that supplied from the burner, is cut oil by the light being put out, the source of supply will be automatically shut off so that it will be impossible for the gas to pass from the burner andthereby cause possible accidents.

Other objects of the invention are to provide a burner which is simple in construction and inexpensive to manufacture; and to provide a burner which is not unsightly in appearance.

With these and other objects in View, the invention will be hereinafter more particularly described with reference to the accompanying drawings, which form a part of this specification, and will then be pointed out in the claims at the end of the description.

In the drawings, Figure 1 is a side elevation of one form of device embodying my invention. Fig. 2 is a vertical section of the device or burner; and Fig. 3 is a plan view.

The device has a body or casing 10 substantially cup-shaped in form, the outer portion of which is closed and sealed by cap or plate 11. The lower portion 12 of the casing 10 is considerably contracted and is provided with a threaded part 13 which is engaged by the internally threaded portion of a coupling or attaching member 141. This member 14: is threaded at one end, as at 15, and is adapted for attachment to a gas fixture so that gas from any suitable source of supply may pass into the member 14 and into the casing 10. A tube 16 is attached to the plate 11 and communicates with the interior of the casing 10 and projects out from said plate 11 so as to form a burner portion. In the outer end of the tube or burner portion 16 is a burner tip 17 of the usual or of any preferred form and to which the passes from the casing 10 into the tube 16 to said tip.

In order to automatically control the supply of gas, 1' arrange a tube or member 18 preferably of thin metal adjacent to the tube or burner portion 16. This tube 18 lies in close relation to the tube 16 and has its upper portion 19 sealed and located adjacent to the outer part of the burner tip and so arranged that the heat of the flame at the burner tip will heat said tube 18. The inner end of the tube 18 projects through the plate 11 by a sealed connection, as by soldering the parts together, and at its inner end said tube is held to a plate or disk 20. This plate 20 may be supported entirely by the tube or container 18 or any additional supporting means within the casing 10 may be provided. A disk, plate or diaphragm 21 of any suitable material, as thin metal, is held at its peripheral edge to the plate or washer 20 so as to form a seal therewith, there being an outer flange on the diaphragm for this purpose. An opening 22 is arranged in the plate or washer 20 so that there is a free communication through said opening 22 between the interior of the tube 18 and the upper surface of the plate or diaphragm 21. A stem 23 extends downward from the diaphragm 21 and at the lower portion of said stem is a valve 24, of a disk or other form, which is adapted normally to rest against a seat 25 when the source of gas supply is shut ofl and is away from the seat when the gas is on andlighted, there being sufficient room around the valve when it is open for the free passage of the gas through to' expand and'such expansion will be ex- 'ertedagainst the diaphragm or plate 21 by reason of the expanded air exerting a pressure"through]the opening 22 against the upper face of said diaphragm. This expansion ofthe air will be suflicient to force the central portion ofthe diaphragm 21 downward so as to carry the stem 23 and valve24 therewith. Thevalve. will thus be unseated and will permit the gas to flow freely into the chamber 10 to the burner tube 16 and to the burner tip 17, and by means of the same match the gas may be lighted. The heat 'from the lighted gas will be such as to keep the air within the tube 18 under expansion and this will keep the valve 24 unseated so long as the gas is lighted. If for any reason the light should be put out accidentally or otherwise either by cutting off the supply of gas orreducing the pressure sufficient to put the light out or by blowing out the light, in that case-the heat will not be present and this will cause the contraction of the air within the tube 18 so that the diaphragm 21 .with the valve 24 ,will move upward to cause the valve 24 to engage the seat 25, thus cutting Off the source of supply. It will be necessary, before the gas can be again lighted or any gas pass through the tube, for the air within the chamber of the tube 18 to be expanded by heat or other means to again unseat the valve 24: V I

It will be understood that the diaphragm 21 has a sealed connection at its peripheral edge with the plate 20 so that the air within the tube 18 and the narrow chamber between said diaphragm and the plate 20 cannot escape or gas enter therein, and likewise the gas entering the body or casing 10 cannot pass therefrom except through the burner tube 16.

, Qrdinarily I insulate the washer or disk 20 and the diaphragm 21 with asbestos or other non-heat conducting material. The lower part of the tube 18 may be also covered. The purpose of this is to prevent the incoming gas within the casing 10 from cooling the heated air within the tube 18.

From the foregoing, it will be evident that simple and efficient means is provided whereby a source of gas supply may be controlled by heat from the burner tip; that a simple and efficient safety burner is provided in'which gas from the source of sup ply is permitted initially to flow freely to theburner tip the heat from a match used to ignite the gas; that simple means is provided whereby the contraction ofair or other medium within a part of the device may control a valve; and that said burner is simple in construction and inexpensive to manufacture.

Having thus described my invention, I claim as new and desire to secure by Letters Patent A device of the character described, comprising a chambered body having a burner tube at one end and means at its other end for connection to a gas supply pipe, a valve seat in said body-"near its gas intake end, an air tube arranged close to the burner tube and extending into the body, a rigid plate secured to the inner end of the air tube and spaced away both from the sides of the body and from the end of said body carrying the burner tube, a diaphragm having its peripheral edge secured to said plate to form an air chamber between them communicating through an opening in said rigid plate with the air tube, astem secured to said diaphragm and carrying a valve adapted to engage said valve seat for cutting off the supply of gas when the diaphragm is collapsed.

This specification signed and witnessed this 7th day of October A. D. 1914.

GEORGE F. HERRMANN.

Witnesses:

LESTER G. TAYLOR, C. BARTELS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

